-47.1% is the change from 637 to 337
Calculation steps:
[( 337 - 637 ) ÷ 637] x 100 = -47.1%
Formula
Percentage change = [(337 - 637) / 637] x 100
Subtract the new number by the original number
337 - 637 = -300
-300 ÷ 637 = -0.47095761381475665
-0.47095761381475665 x 100 = -47.1%